The Custer Area Chamber of Commerce is sponsoring the 7th Annual Sound of Silence Tesla Rally, where $5 million in cars make a road trip to Custer, South Dakota. The annual Custer event is the only one of its kind in the United States. Tesla owners are invited to come explore the beautiful drives the southern Black Hills has to offer. The cars will be on display for viewing and questions on Friday evening, May 15, 5-7 p.m., in downtown Custer.